SU1270143A1 - Method of manufacturing wall ceramic articles - Google Patents

Abstract

1. METHOD OF MANUFACTURING WALL CERAMIC PRODUCTS by dehydrating flotation waste, coal enrichment, blending with additive, forming blanks, drying and roasting, which are mixed with 10-60% by weight to increase product strength and environmental protection. .% waste of gravitational enrichment of coal of the 13150 mm fraction, crushed to a particle size less than 4 mm. 2. A method according to claim 1, characterized in that the waste of the gravitational enrichment of coal, crushed to a particle size of less than 4 mm, contains 25-50% by weight of the fraction 0.5-4 mm and 820% by weight of the fraction less than 0.005 mm. 3. The method according to claim 1, characterized in that when the carbon content in the waste flotation of coal or the waste of gravity concentration of coal is more than 10%, (L waste of flotation concentration of coal is mixed with 10-60% by weight of waste of gravity concentration of coal of fraction 40 -150 mm, crushed to a particle size of less than 4 mm. To with

Description

1 The invention relates to the production of building materials, primarily to the manufacture of ceramic bricks and stones. The aim of the invention is to increase the strength of the products and protect the environment. Waste flotation coal is a fine-grained homogenized material obtained after flotation in the pulp input (with a solids content of 40-80 g / l) and having a moisture content of 50-60% after the thickener. The carbon content is in the range of 10-30%, calculated on the dry matter. By the ceramic-technological properties, the flotation waste is close to the traditional raw materials used for the production of wall materials. It is well molded and insensitive to drying. Waste of gravitational enrichment of coal is lumpy, material with a particle size of 1-150 mm, moisture content of 8-12%, with a carbon content of 2-15%. As the size of the waste increases, their moisture content and carbon content decrease. Therefore, to reduce moisture and carbon content, it is proposed to isolate a fraction of 13–150 mm and grind to a particle size of less than 4 mm. The resulting powder will have a moisture content of 2–6% and a carbon content of 1–5%. With an increased carbon content, it is necessary to select a fraction of 40–150 mm and grind to a particle size less than 4 mm. The granulometric composition of the waste of the gravitational enrichment of coal (class 13-150 mm before grinding) is as follows,%: fraction 1-13 mm 8.8; fractions 13-25 mm 25.8; fractions 2550 mm 23.9; fractions 50-100 mm 19.1; fractions greater than 100 mm 22 l 3, The particle size distribution of flotation waste is as follows,%: fraction 10, 3 mm 3-8; fraction 0.3-0.1 by whom in the th fraction 0.1-0.045 mm 7-10j fraction 0.045-0.01 mm 75-80. The mineral part of the flotation waste and the waste of gravity is the same; the maintenance of the main components varies only depending on the ratio of the mineral and organic parts. The chemical composition of the mineral part of the waste is as follows: SiO 35-60; AljOj 15-28; 6-12; CaO 2-4; MgO 1.5-3; NajO 0.3-1; 1.5, 3.0; SOj 0.5-5. The technology for making wall ceramic products is as follows. Waste from the flotation of coal from the technology line of the coal preparation plant is pumped into cylindrical thickeners by means of a pump, in which they thicken to a moisture content of 50-55%, then fed to a press filter and dehydrated to a moisture content of 24-26%. Dehydrated waste flotation coal is dosed with prepared waste gravity coal enrichment. Waste of gravity concentration of coal with a grain size of 1-150 mm is sorted, the fraction of 13-150 mm is extracted, and the rotor is crushed in a hammer rotary (or other type) crusher to a coarseness of less than 4 mm. The resulting powder is dosed with waste flotation of coal. The resulting mixture of normal molding moisture is processed in the clay processing equipment and molded hollow products in a vacuum press. The products are dried in a dryer of any type for 6-60 hours and burned in a tunnel furnace of a special design providing an isothermal stand for carbon burnout and the removal of excess heat, which is used for process and domestic needs. The maximum burning temperature is 1020-1080 ° C, depending on the type of waste, the burning time is 48-90 hours. In the table. 1 presents the different compositions of the mixture, in table. 2 - properties of the products obtained, depending on the particle size distribution of the waste of gravitational enrichment of coal.

Table 1

Flotation waste

coal preparation

Waste of gravitational enrichment of coal, crushed to a particle size of less than 4 mm

Frost resistance of products in all cases of more than 25 picles.

40

70

60

thirty

table 2

Claims (3)

1. METHOD OF MANUFACTURING WALL CERAMIC PRODUCTS by dehydrating flotation waste, coal preparation, mixing with an additive, forming blanks, drying and roasting, characterized in that, in order to increase the strength of products and environmental protection, waste flotation enrichment is mixed with 10-60 masd waste of gravitational enrichment of coal fraction 10Ι 50 mm, crushed to a particle size less than 4 mm. 2. The way pop. 1, characterized in that the waste of gravitational enrichment of coal, crushed to a particle size less than 4 mm, contains 25-50 masD fraction of 0.5-4 mm and 820 masD fraction less than 0.005 mm. 3. The way pop. 1, characterized in that when the carbon content in waste flotation of coal or waste of gravity concentration of coal is more than 10 £, waste of flotation concentration of coal is mixed with 10-60 wt.% Of waste of gravity concentration of coal fraction 40-150 mm, crushed to a particle size less than 4 mm £ 1270143 1270143